
# coding: utf-8

# In[1]:


print(type(1))
print(type(1.0))
print(type(""))

'''
<class 'int'>
<class 'float'>
<class 'str'>
'''
# In[2]:


print(len(1))
'''
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-2-36d2f578b221> in <module>()
----> 1 print(len(1))

TypeError: object of type 'int' has no len()
'''

# In[3]:


print(len(1.0))
'''
TypeError                                 Traceback (most recent call last)
<ipython-input-3-f4291b55b5f5> in <module>()
----> 1 print(len(1.0))

TypeError: object of type 'float' has no len()
'''

# In[4]:


print(len("abc"))
'''
3
'''

# In[5]:


print(hex(1024))
print(hex(12800))
print(hex(65536))
'''
0x400
0x3200
0x10000
'''

# In[6]:


def move(n, a, b, c):
    if n==1:
        print("将"+a+'移动到'+c)
        return
    else:
        move(n-1,a,c,b)  #首先需要把 (N-1) 个圆盘移动到 b
        move(1,a,b,c)    #将a的最后一个圆盘移动到c
        move(n-1,b,a,c)  #再将b的(N-1)个圆盘移动到c
move(4, 'A', 'B', 'C')

'''
将A移动到B
将A移动到C
将B移动到C
将A移动到B
将C移动到A
将C移动到B
将A移动到B
将A移动到C
将B移动到C
将B移动到A
将C移动到A
将B移动到C
将A移动到B
将A移动到C
将B移动到C
'''

#e7.1DrawSevenSegDisplay.py
import turtle, datetime
def drawLine(draw):   #绘制单段数码管
    turtle.pendown() if draw else turtle.penup()
    turtle.fd(40)
    turtle.right(90)
def drawDigit(digit): #根据数字绘制七段数码管
    drawLine(True) if digit in [2,3,4,5,6,8,9] else drawLine(False)
    drawLine(True) if digit in [0,1,3,4,5,6,7,8,9] else drawLine(False)
    drawLine(True) if digit in [0,2,3,5,6,8,9] else drawLine(False)
    drawLine(True) if digit in [0,2,6,8] else drawLine(False)
    turtle.left(90)
    drawLine(True) if digit in [0,4,5,6,8,9] else drawLine(False)
    drawLine(True) if digit in [0,2,3,5,6,7,8,9] else drawLine(False)
    drawLine(True) if digit in [0,1,2,3,4,7,8,9] else drawLine(False)
    turtle.left(180)
    turtle.penup()
    turtle.fd(20) 
def drawDate(date):  #获得要输出的数字
    for i in date:
        drawDigit(eval(i))  #注意: 通过eval()函数将数字变为整数
def main():
    turtle.setup(800, 350, 200, 200)
    turtle.penup()
    turtle.fd(-300)
    turtle.pensize(5)
    drawDate(datetime.datetime.now().strftime('%Y%m%d'))
    turtle.hideturtle()
main()    

#e7.2DrawSevenSegDisplay.py
import turtle, datetime
def drawGap(): #绘制数码管间隔
    turtle.penup()
    turtle.fd(5)
def drawLine(draw):   #绘制单段数码管
    drawGap()
    turtle.pendown() if draw else turtle.penup()
    turtle.fd(40)
    drawGap()    
    turtle.right(90)
def drawDigit(d): #根据数字绘制七段数码管
    drawLine(True) if d in [2,3,4,5,6,8,9] else drawLine(False)
    drawLine(True) if d in [0,1,3,4,5,6,7,8,9] else drawLine(False)
    drawLine(True) if d in [0,2,3,5,6,8,9] else drawLine(False)
    drawLine(True) if d in [0,2,6,8] else drawLine(False)
    turtle.left(90)
    drawLine(True) if d in [0,4,5,6,8,9] else drawLine(False)
    drawLine(True) if d in [0,2,3,5,6,7,8,9] else drawLine(False)
    drawLine(True) if d in [0,1,2,3,4,7,8,9] else drawLine(False)
    turtle.left(180)
    turtle.penup()
    turtle.fd(20) 
def drawDate(date):
    turtle.pencolor("red")
    for i in date:
        if i == '-':
            turtle.write('年',font=("Arial", 18, "normal"))
            turtle.pencolor("green")
            turtle.fd(40) 
        elif i == '=':
            turtle.write('月',font=("Arial", 18, "normal"))
            turtle.pencolor("blue")
            turtle.fd(40)
        elif i == '+':
            turtle.write('日',font=("Arial", 18, "normal"))
        else:
            drawDigit(eval(i))
def main():
    turtle.setup(800, 350, 200, 200)
    turtle.penup()
    turtle.fd(-350)
    turtle.pensize(5)
    drawDate(datetime.datetime.now().strftime('%Y-%m=%d+'))
    turtle.hideturtle()
main()    
